Heterocyclic CompoundsAza CompoundsHeterocyclic Compounds, Bridged-RingNitrogen CompoundsCyclizationHeterocyclic Compounds, 2-RingPalladiumMolecular StructureHeterocyclic Compounds with 4 or More RingsHeterocyclic Compounds, 3-RingMagnetic Resonance SpectroscopyHeterocyclic Compounds, 1-RingMacrolidesLeucomycinsLactonesAzathioprineStreptomycesJosamycinMacrocyclic CompoundsErythromycinTylosinStereoisomerismAnti-Bacterial AgentsMiocamycinStructure-Activity RelationshipSpiro CompoundsEnediynesAzacitidineSulfur CompoundsPolyketide SynthasesCycloparaffinsVolatile Organic CompoundsFermentationBiological ProductsMolecular ConformationAminoglycosidesCyclitolsEpoxy CompoundsGlycosidesDrug Screening Assays, AntitumorLactamsChromatography, High Pressure LiquidSalaciaSpectrometry, Mass, Fast Atom BombardmentStreptomyces lividansChemistryFuransChemical PhenomenaMicrobial Sensitivity TestsPlant ExtractsIsocoumarinsDrug Evaluation, PreclinicalAzithromycinSmall Molecule LibrariesBacteria